Outer hexagonal expansion bolt

Abstract

The utility model relates to the field of expansion bolts, and discloses an outer hexagonal expansion bolt which comprises an expansion pipe and a countersunk bolt, a plurality of fixing blocks are fixedly arranged on the periphery of the lower end of the expansion pipe, connecting blocks are fixedly arranged on the two sides of the interior of each fixing block, connecting rods are fixedly arranged on the opposite sides of the connecting blocks in pairs, and the countersunk bolt is fixedly arranged on the lower end of the expansion pipe. The outer surfaces of the multiple connecting rods are movably sleeved with movable plates, and the upper ends of the countersunk bolts are sleeved with protective covers in a threaded mode. According to the expansion bolt, the fixed block, the movable plate, the connecting blocks and the connecting rod are arranged, the connecting blocks are fixed through the fixed block, then the connecting rod is fixedly arranged between the two connecting blocks, and then the movable plate is fixed through the connecting rod, when the expansion bolt is used, a hexagon nut is screwed to enable a countersunk bolt to move towards the interior of an expansion pipe, and the movable plate is expanded outwards; and compared with a traditional expansion pipe which is in hard connection, the expansion pipe is prone to breakage when the stress is too large, and the practicability is higher.

Description

Technical Field

[0001] The utility model relates to the field of expansion bolts, in particular to an external hexagon expansion bolt. Background Art

[0002] Expansion bolts are an anchoring device that can be installed by drilling holes on existing buildings. During installation, the expansion bolts are placed in the drilled holes of the existing buildings. The countersunk bolts are pulled outward by tightening the hexagonal nuts, and the expansion tubes with cut ends are passively opened outward, so that the countersunk bolts apply positive pressure perpendicular to the hole wall to the expansion tubes, thereby generating a certain pull-out resistance to achieve the purpose of anchoring.

[0003] The existing expansion bolts have an expansion tube with a cut end which is a rigid connection. When the expansion tube is subjected to excessive force, the expansion tube is prone to breakage, which is more practical. Therefore, those skilled in the art provide a hexagonal expansion bolt to solve the problems raised in the above background technology. Summary of the invention

[0004] The purpose of the utility model is to solve the shortcomings existing in the prior art, and to propose an external hexagon expansion bolt, the expansion bolt has a protective structure, which can prevent rain from dripping onto the hexagonal nut when the expansion bolt is used outdoors, thereby causing the hexagonal nut to rust and become difficult to disassemble later. In addition, compared with the traditional expansion tube, which is a hard connection and is easily broken when subjected to excessive force, the expansion bolt is more practical.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] An external hexagon expansion bolt comprises an expansion tube and a countersunk bolt, wherein a plurality of fixing blocks are fixedly arranged around the lower end of the expansion tube, and connection blocks are fixedly arranged on both sides of the plurality of fixing blocks;

[0007] A plurality of the connecting blocks are fixedly provided with connecting rods on opposite sides of a group of two, and a movable plate is movably sleeved on the outer surface of the plurality of connecting rods, and a protective cover is threadedly sleeved on the upper end of the countersunk bolt;

[0008] Through the above technical scheme, the expansion tube expands to fix the expansion bolt so that the object can be fixed on the wall, the ground or other surfaces, the countersunk bolt moves into the expansion tube, so that the expansion tube expands, the fixing block can be used to fix the movable plate, the connecting block can be used to fix the connecting rod, and the connecting rod can be used to sleeve the movable plate. When the countersunk bolt moves into the expansion bolt, the movable plate will move outward. The protective cover can be used to protect the hexagonal nut and the countersunk bolt, so as to prevent rain from falling on the hexagonal nut when the expansion bolt is used outdoors, thereby causing the hexagonal nut to rust and making it difficult to disassemble later.

[0009] Furthermore, a plurality of anti-sliding blocks are fixedly provided on the outer surface of the expansion tube;

[0010] Through the above technical solution, the anti-sliding block can be used to prevent the expansion bolts from falling off due to vibration of the wall or the ground after the expansion bolts are fixed, thereby reducing the reliability of the expansion bolts.

[0011] Furthermore, a spring washer is provided on a movable sleeve at the middle position of the upper end of the outer surface of the countersunk bolt;

[0012] Through the above technical solution, the spring washer can be used to increase the friction between the hexagonal nut and the countersunk bolt, thereby increasing the tightness of the connection.

[0013] Furthermore, a flat washer is provided on a movable sleeve at a lower position of the upper end of the outer surface of the countersunk bolt;

[0014] Through the above technical solution, the flat washer can be used to increase friction, prevent the connection from loosening, and further increase the tightness of the connection.

[0015] Furthermore, a hexagonal nut is threadedly sleeved on the upper part of the outer surface of the countersunk bolt;

[0016] Through the above technical solution, the hexagonal nut plays a role in connection and tightening, and it is convenient for the user to tighten the countersunk bolt.

[0017] Furthermore, a thread groove is formed at the upper end of the countersunk bolt;

[0018] Through the above technical solution, the thread groove can be used to fix the threaded rod.

[0019] Furthermore, a threaded rod is fixedly provided at the middle position of the lower end of the protective cover;

[0020] Through the above technical solution, the threaded rod can be used in conjunction with the threaded groove to achieve the connection between the protective cover and the countersunk bolt.

[0021] Furthermore, through holes are provided on both sides of the movable plate;

[0022] Through the above technical solution, the through hole can conveniently connect the connecting rod and the connecting block.

[0023] The utility model has the following beneficial effects:

[0024] 1. The utility model provides an external hexagon expansion bolt, which is provided with a protective cover, a countersunk bolt, a threaded groove and a threaded rod. After the expansion bolt is fixed in use, the threaded groove and the threaded rod are used in combination to fix the protective cover and the countersunk bolt, thereby preventing rain from dripping onto the hexagonal nut when the expansion bolt is used outdoors, thereby causing the hexagonal nut to rust and become difficult to disassemble later.

[0025] 2. The utility model proposes an external hexagon expansion bolt, which is provided with a fixed block, a movable plate, a connecting block and a connecting rod. The connecting block is fixed by the fixed block, and the connecting rod is fixedly provided between the two connecting blocks. The connecting rod fixes the movable plate. When in use, the hexagonal nut is screwed to move the countersunk bolt into the inside of the expansion tube, and the movable plate is expanded outward, so that the expansion bolt is fixed inside the installation hole. Compared with the traditional expansion tube which is a hard connection, the expansion tube is easy to break when the force is too large, and the utility model is more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the overall axial side of an external hexagonal expansion bolt proposed by the utility model;

[0027] Figure 2 This is a schematic diagram of the axial side of an external hexagon expansion bolt with the protective cover removed provided by the utility model;

[0028] Figure 3 This is a front view schematic diagram of a hexagonal expansion bolt proposed by the utility model with the protective cover removed;

[0029] Figure 4 This is an overall front cross-sectional schematic diagram of an external hexagonal expansion bolt proposed by the utility model;

[0030] Figure 5 This is an enlarged view of point A of an external hexagonal expansion bolt proposed by the utility model.

[0031] Legend:

[0032] 1. Expansion tube; 2. Anti-sliding block; 3. Fixed block; 4. Movable plate; 5. Spring washer; 6. Flat washer; 7. Protective cover; 8. Hexagonal nut; 9. Countersunk bolt; 10. Threaded groove; 11. Threaded rod; 12. Connecting block; 13. Connecting rod; 14. Through hole. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] Reference Figure 1-4The utility model provides an embodiment: an external hexagon expansion bolt, including an expansion tube 1 and a countersunk bolt 9, the expansion tube 1 is expanded to fix the expansion bolt so that the object can be fixed on the wall, the ground or other surfaces, the countersunk bolt 9 moves into the expansion tube 1, so that the expansion tube 1 is expanded, and a plurality of fixing blocks 3 are fixedly arranged around the lower end of the expansion tube 1, and the fixing blocks 3 can be used to fix the movable plate 4, and the plurality of fixing blocks 3 are fixedly arranged on both sides thereof, and the connecting blocks 12 can be used to fix the connecting rod 13;

[0035] A plurality of connecting blocks 12 are arranged in groups of two on one side with connecting rods 13 fixed thereon. The connecting rods 13 can be used to sleeve the movable plate 4. The outer surfaces of the plurality of connecting rods 13 are movably sleeved with the movable plate 4. When the countersunk bolt 9 moves toward the inside of the expansion bolt, the movable plate 4 will move outward. A protective cover 7 is provided on the threaded sleeve on the upper end of the countersunk bolt 9. The protective cover 7 can be used to protect the hexagonal nut 8 and the countersunk bolt 9, thereby preventing rain from splashing onto the hexagonal nut 8 when the expansion bolt is used outdoors, thereby causing the hexagonal nut 8 to rust and making it difficult to disassemble later.

[0036] A plurality of anti-sliding blocks 2 are fixedly arranged on the outer surface of the expansion tube 1. The anti-sliding blocks 2 can be used to prevent the expansion bolts from falling off due to vibration of the wall or the ground after the expansion bolts are fixed, thereby reducing the reliability of the expansion bolts. A spring washer 5 is provided on the movable sleeve at the middle position of the upper end of the outer surface of the countersunk bolt 9. The spring washer 5 can be used to increase the friction between the hexagonal nut 8 and the countersunk bolt 9, thereby increasing the tightness of the connection. A flat washer 6 is provided on the movable sleeve at the lower position of the upper end of the outer surface of the countersunk bolt 9. The flat washer 6 can be used to increase friction and prevent the connection from loosening, thereby further increasing the tightness of the connection. A hexagonal nut 8 is provided on the threaded sleeve at the upper position of the upper end of the outer surface of the countersunk bolt 9. The hexagonal nut 8 plays a role in tightening the connection and is convenient for the user to screw the countersunk bolt 9.

[0037] A threaded groove 10 is provided at the upper end of the countersunk bolt 9, and the threaded groove 10 can be used to fix the threaded rod 11. A threaded rod 11 is fixedly provided at the middle position of the lower end of the protective cover 7, and the threaded rod 11 can be used in conjunction with the threaded groove 10 to connect the protective cover 7 and the countersunk bolt 9. Through holes 14 are provided on both sides of the movable plate 4, and the through holes 14 can facilitate the connection between the connecting rod 13 and the connecting block 12.

[0038] Working principle: When the expansion bolt is used, the assembled expansion bolt is inserted into the opened installation hole, and then the hexagonal nut 8 is screwed to move the countersunk bolt 9 into the expansion tube 1, and the movable plate 4 is expanded outward, so that the expansion bolt is fixed in the installation hole. When the expansion bolt is to be taken out, the hexagonal nut is screwed again. After the expansion bolt is fixed, the threaded groove 10 and the threaded rod 11 are used in combination to fix the protective cover 7 and the countersunk bolt 9, so as to avoid the expansion bolt from being used outdoors. Rainwater falls on the hexagonal nut 8, causing the hexagonal nut 8 to rust and become difficult to remove later. The expansion bolt fixes the connecting block 12 through the fixing block 3, and then a connecting rod 13 is fixed between the two connecting blocks 12. The connecting rod 13 fixes the movable plate 4. When in use, the hexagonal nut 8 is screwed to move the countersunk bolt 9 into the expansion tube 1 and expand the movable plate 4 outward, so that the expansion bolt is fixed inside the mounting hole. Compared with the traditional expansion tube 1, which is a hard connection and is easy to break when subjected to excessive force, it is more practical.

[0039] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An external hexagon expansion bolt, comprising an expansion tube (1) and a countersunk bolt (9), characterized in that: A plurality of fixing blocks (3) are fixedly arranged around the lower end of the expansion tube (1), and a connection block (12) is fixedly arranged on both sides of the plurality of fixing blocks (3); A plurality of the connecting blocks (12) are each fixedly provided with a connecting rod (13) on one side opposite to the other in a group of two. A movable plate (4) is movably sleeved on the outer surface of each of the connecting rods (13). A protective cover (7) is threadedly sleeved on the upper end of the countersunk bolt (9).

2. The hexagonal expansion bolt according to claim 1, characterized in that: A plurality of anti-sliding blocks (2) are fixedly arranged on the outer surface of the expansion tube (1).

3. The hexagonal expansion bolt according to claim 1, characterized in that: A spring washer (5) is provided in a movable sleeve at the middle position of the upper end of the outer surface of the countersunk bolt (9).

4. The hexagonal expansion bolt according to claim 1, characterized in that: A flat washer (6) is movably sleeved at a lower position on the upper end of the outer surface of the countersunk bolt (9).

5. The hexagonal expansion bolt according to claim 1, characterized in that: A hexagonal nut (8) is threadedly sleeved on the upper portion of the outer surface of the countersunk bolt (9).

6. The hexagonal expansion bolt according to claim 1, characterized in that: A thread groove (10) is formed at the upper end of the countersunk bolt (9).

7. The hexagonal expansion bolt according to claim 1, characterized in that: A threaded rod (11) is fixedly arranged at the middle position of the lower end of the protective cover (7).

8. The hexagonal expansion bolt according to claim 1, characterized in that: Through holes (14) are provided on both sides of the movable plate (4).

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